2588 lines · c
1/*2 * usbmidi.c - ALSA USB MIDI driver3 *4 * Copyright (c) 2002-2009 Clemens Ladisch5 * All rights reserved.6 *7 * Based on the OSS usb-midi driver by NAGANO Daisuke,8 * NetBSD's umidi driver by Takuya SHIOZAKI,9 * the "USB Device Class Definition for MIDI Devices" by Roland10 *11 * Redistribution and use in source and binary forms, with or without12 * modification, are permitted provided that the following conditions13 * are met:14 * 1. Redistributions of source code must retain the above copyright15 * notice, this list of conditions, and the following disclaimer,16 * without modification.17 * 2. The name of the author may not be used to endorse or promote products18 * derived from this software without specific prior written permission.19 *20 * Alternatively, this software may be distributed and/or modified under the21 * terms of the GNU General Public License as published by the Free Software22 * Foundation; either version 2 of the License, or (at your option) any later23 * version.24 *25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF35 * SUCH DAMAGE.36 */37 38#include <linux/kernel.h>39#include <linux/types.h>40#include <linux/bitops.h>41#include <linux/interrupt.h>42#include <linux/spinlock.h>43#include <linux/string.h>44#include <linux/init.h>45#include <linux/slab.h>46#include <linux/timer.h>47#include <linux/usb.h>48#include <linux/wait.h>49#include <linux/usb/audio.h>50#include <linux/usb/midi.h>51#include <linux/module.h>52 53#include <sound/core.h>54#include <sound/control.h>55#include <sound/rawmidi.h>56#include <sound/asequencer.h>57#include "usbaudio.h"58#include "midi.h"59#include "power.h"60#include "helper.h"61 62/*63 * define this to log all USB packets64 */65/* #define DUMP_PACKETS */66 67/*68 * how long to wait after some USB errors, so that hub_wq can disconnect() us69 * without too many spurious errors70 */71#define ERROR_DELAY_JIFFIES (HZ / 10)72 73#define OUTPUT_URBS 774#define INPUT_URBS 775 76 77MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");78MODULE_DESCRIPTION("USB Audio/MIDI helper module");79MODULE_LICENSE("Dual BSD/GPL");80 81struct snd_usb_midi_in_endpoint;82struct snd_usb_midi_out_endpoint;83struct snd_usb_midi_endpoint;84 85struct usb_protocol_ops {86 void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int);87 void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb);88 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);89 void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint *);90 void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint *);91};92 93struct snd_usb_midi {94 struct usb_device *dev;95 struct snd_card *card;96 struct usb_interface *iface;97 const struct snd_usb_audio_quirk *quirk;98 struct snd_rawmidi *rmidi;99 const struct usb_protocol_ops *usb_protocol_ops;100 struct list_head list;101 struct timer_list error_timer;102 spinlock_t disc_lock;103 struct rw_semaphore disc_rwsem;104 struct mutex mutex;105 u32 usb_id;106 int next_midi_device;107 108 struct snd_usb_midi_endpoint {109 struct snd_usb_midi_out_endpoint *out;110 struct snd_usb_midi_in_endpoint *in;111 } endpoints[MIDI_MAX_ENDPOINTS];112 unsigned long input_triggered;113 unsigned int opened[2];114 unsigned char disconnected;115 unsigned char input_running;116 117 struct snd_kcontrol *roland_load_ctl;118};119 120struct snd_usb_midi_out_endpoint {121 struct snd_usb_midi *umidi;122 struct out_urb_context {123 struct urb *urb;124 struct snd_usb_midi_out_endpoint *ep;125 } urbs[OUTPUT_URBS];126 unsigned int active_urbs;127 unsigned int drain_urbs;128 int max_transfer; /* size of urb buffer */129 struct work_struct work;130 unsigned int next_urb;131 spinlock_t buffer_lock;132 133 struct usbmidi_out_port {134 struct snd_usb_midi_out_endpoint *ep;135 struct snd_rawmidi_substream *substream;136 int active;137 uint8_t cable; /* cable number << 4 */138 uint8_t state;139#define STATE_UNKNOWN 0140#define STATE_1PARAM 1141#define STATE_2PARAM_1 2142#define STATE_2PARAM_2 3143#define STATE_SYSEX_0 4144#define STATE_SYSEX_1 5145#define STATE_SYSEX_2 6146 uint8_t data[2];147 } ports[0x10];148 int current_port;149 150 wait_queue_head_t drain_wait;151};152 153struct snd_usb_midi_in_endpoint {154 struct snd_usb_midi *umidi;155 struct urb *urbs[INPUT_URBS];156 struct usbmidi_in_port {157 struct snd_rawmidi_substream *substream;158 u8 running_status_length;159 } ports[0x10];160 u8 seen_f5;161 bool in_sysex;162 u8 last_cin;163 u8 error_resubmit;164 int current_port;165};166 167static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep);168 169static const uint8_t snd_usbmidi_cin_length[] = {170 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1171};172 173/*174 * Submits the URB, with error handling.175 */176static int snd_usbmidi_submit_urb(struct urb *urb, gfp_t flags)177{178 int err = usb_submit_urb(urb, flags);179 if (err < 0 && err != -ENODEV)180 dev_err(&urb->dev->dev, "usb_submit_urb: %d\n", err);181 return err;182}183 184/*185 * Error handling for URB completion functions.186 */187static int snd_usbmidi_urb_error(const struct urb *urb)188{189 switch (urb->status) {190 /* manually unlinked, or device gone */191 case -ENOENT:192 case -ECONNRESET:193 case -ESHUTDOWN:194 case -ENODEV:195 return -ENODEV;196 /* errors that might occur during unplugging */197 case -EPROTO:198 case -ETIME:199 case -EILSEQ:200 return -EIO;201 default:202 dev_err(&urb->dev->dev, "urb status %d\n", urb->status);203 return 0; /* continue */204 }205}206 207/*208 * Receives a chunk of MIDI data.209 */210static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint *ep,211 int portidx, uint8_t *data, int length)212{213 struct usbmidi_in_port *port = &ep->ports[portidx];214 215 if (!port->substream) {216 dev_dbg(&ep->umidi->dev->dev, "unexpected port %d!\n", portidx);217 return;218 }219 if (!test_bit(port->substream->number, &ep->umidi->input_triggered))220 return;221 snd_rawmidi_receive(port->substream, data, length);222}223 224#ifdef DUMP_PACKETS225static void dump_urb(const char *type, const u8 *data, int length)226{227 pr_debug("%s packet: [", type);228 for (; length > 0; ++data, --length)229 pr_cont(" %02x", *data);230 pr_cont(" ]\n");231}232#else233#define dump_urb(type, data, length) /* nothing */234#endif235 236/*237 * Processes the data read from the device.238 */239static void snd_usbmidi_in_urb_complete(struct urb *urb)240{241 struct snd_usb_midi_in_endpoint *ep = urb->context;242 243 if (urb->status == 0) {244 dump_urb("received", urb->transfer_buffer, urb->actual_length);245 ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,246 urb->actual_length);247 } else {248 int err = snd_usbmidi_urb_error(urb);249 if (err < 0) {250 if (err != -ENODEV) {251 ep->error_resubmit = 1;252 mod_timer(&ep->umidi->error_timer,253 jiffies + ERROR_DELAY_JIFFIES);254 }255 return;256 }257 }258 259 urb->dev = ep->umidi->dev;260 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);261}262 263static void snd_usbmidi_out_urb_complete(struct urb *urb)264{265 struct out_urb_context *context = urb->context;266 struct snd_usb_midi_out_endpoint *ep = context->ep;267 unsigned int urb_index;268 unsigned long flags;269 270 spin_lock_irqsave(&ep->buffer_lock, flags);271 urb_index = context - ep->urbs;272 ep->active_urbs &= ~(1 << urb_index);273 if (unlikely(ep->drain_urbs)) {274 ep->drain_urbs &= ~(1 << urb_index);275 wake_up(&ep->drain_wait);276 }277 spin_unlock_irqrestore(&ep->buffer_lock, flags);278 if (urb->status < 0) {279 int err = snd_usbmidi_urb_error(urb);280 if (err < 0) {281 if (err != -ENODEV)282 mod_timer(&ep->umidi->error_timer,283 jiffies + ERROR_DELAY_JIFFIES);284 return;285 }286 }287 snd_usbmidi_do_output(ep);288}289 290/*291 * This is called when some data should be transferred to the device292 * (from one or more substreams).293 */294static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep)295{296 unsigned int urb_index;297 struct urb *urb;298 unsigned long flags;299 300 spin_lock_irqsave(&ep->buffer_lock, flags);301 if (ep->umidi->disconnected) {302 spin_unlock_irqrestore(&ep->buffer_lock, flags);303 return;304 }305 306 urb_index = ep->next_urb;307 for (;;) {308 if (!(ep->active_urbs & (1 << urb_index))) {309 urb = ep->urbs[urb_index].urb;310 urb->transfer_buffer_length = 0;311 ep->umidi->usb_protocol_ops->output(ep, urb);312 if (urb->transfer_buffer_length == 0)313 break;314 315 dump_urb("sending", urb->transfer_buffer,316 urb->transfer_buffer_length);317 urb->dev = ep->umidi->dev;318 if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)319 break;320 ep->active_urbs |= 1 << urb_index;321 }322 if (++urb_index >= OUTPUT_URBS)323 urb_index = 0;324 if (urb_index == ep->next_urb)325 break;326 }327 ep->next_urb = urb_index;328 spin_unlock_irqrestore(&ep->buffer_lock, flags);329}330 331static void snd_usbmidi_out_work(struct work_struct *work)332{333 struct snd_usb_midi_out_endpoint *ep =334 container_of(work, struct snd_usb_midi_out_endpoint, work);335 336 snd_usbmidi_do_output(ep);337}338 339/* called after transfers had been interrupted due to some USB error */340static void snd_usbmidi_error_timer(struct timer_list *t)341{342 struct snd_usb_midi *umidi = from_timer(umidi, t, error_timer);343 unsigned int i, j;344 345 spin_lock(&umidi->disc_lock);346 if (umidi->disconnected) {347 spin_unlock(&umidi->disc_lock);348 return;349 }350 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {351 struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;352 if (in && in->error_resubmit) {353 in->error_resubmit = 0;354 for (j = 0; j < INPUT_URBS; ++j) {355 if (atomic_read(&in->urbs[j]->use_count))356 continue;357 in->urbs[j]->dev = umidi->dev;358 snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);359 }360 }361 if (umidi->endpoints[i].out)362 snd_usbmidi_do_output(umidi->endpoints[i].out);363 }364 spin_unlock(&umidi->disc_lock);365}366 367/* helper function to send static data that may not DMA-able */368static int send_bulk_static_data(struct snd_usb_midi_out_endpoint *ep,369 const void *data, int len)370{371 int err = 0;372 void *buf = kmemdup(data, len, GFP_KERNEL);373 if (!buf)374 return -ENOMEM;375 dump_urb("sending", buf, len);376 if (ep->urbs[0].urb)377 err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,378 buf, len, NULL, 250);379 kfree(buf);380 return err;381}382 383/*384 * Standard USB MIDI protocol: see the spec.385 * Midiman protocol: like the standard protocol, but the control byte is the386 * fourth byte in each packet, and uses length instead of CIN.387 */388 389static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint *ep,390 uint8_t *buffer, int buffer_length)391{392 int i;393 394 for (i = 0; i + 3 < buffer_length; i += 4)395 if (buffer[i] != 0) {396 int cable = buffer[i] >> 4;397 int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];398 snd_usbmidi_input_data(ep, cable, &buffer[i + 1],399 length);400 }401}402 403static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint *ep,404 uint8_t *buffer, int buffer_length)405{406 int i;407 408 for (i = 0; i + 3 < buffer_length; i += 4)409 if (buffer[i + 3] != 0) {410 int port = buffer[i + 3] >> 4;411 int length = buffer[i + 3] & 3;412 snd_usbmidi_input_data(ep, port, &buffer[i], length);413 }414}415 416/*417 * Buggy M-Audio device: running status on input results in a packet that has418 * the data bytes but not the status byte and that is marked with CIN 4.419 */420static void snd_usbmidi_maudio_broken_running_status_input(421 struct snd_usb_midi_in_endpoint *ep,422 uint8_t *buffer, int buffer_length)423{424 int i;425 426 for (i = 0; i + 3 < buffer_length; i += 4)427 if (buffer[i] != 0) {428 int cable = buffer[i] >> 4;429 u8 cin = buffer[i] & 0x0f;430 struct usbmidi_in_port *port = &ep->ports[cable];431 int length;432 433 length = snd_usbmidi_cin_length[cin];434 if (cin == 0xf && buffer[i + 1] >= 0xf8)435 ; /* realtime msg: no running status change */436 else if (cin >= 0x8 && cin <= 0xe)437 /* channel msg */438 port->running_status_length = length - 1;439 else if (cin == 0x4 &&440 port->running_status_length != 0 &&441 buffer[i + 1] < 0x80)442 /* CIN 4 that is not a SysEx */443 length = port->running_status_length;444 else445 /*446 * All other msgs cannot begin running status.447 * (A channel msg sent as two or three CIN 0xF448 * packets could in theory, but this device449 * doesn't use this format.)450 */451 port->running_status_length = 0;452 snd_usbmidi_input_data(ep, cable, &buffer[i + 1],453 length);454 }455}456 457/*458 * QinHeng CH345 is buggy: every second packet inside a SysEx has not CIN 4459 * but the previously seen CIN, but still with three data bytes.460 */461static void ch345_broken_sysex_input(struct snd_usb_midi_in_endpoint *ep,462 uint8_t *buffer, int buffer_length)463{464 unsigned int i, cin, length;465 466 for (i = 0; i + 3 < buffer_length; i += 4) {467 if (buffer[i] == 0 && i > 0)468 break;469 cin = buffer[i] & 0x0f;470 if (ep->in_sysex &&471 cin == ep->last_cin &&472 (buffer[i + 1 + (cin == 0x6)] & 0x80) == 0)473 cin = 0x4;474#if 0475 if (buffer[i + 1] == 0x90) {476 /*477 * Either a corrupted running status or a real note-on478 * message; impossible to detect reliably.479 */480 }481#endif482 length = snd_usbmidi_cin_length[cin];483 snd_usbmidi_input_data(ep, 0, &buffer[i + 1], length);484 ep->in_sysex = cin == 0x4;485 if (!ep->in_sysex)486 ep->last_cin = cin;487 }488}489 490/*491 * CME protocol: like the standard protocol, but SysEx commands are sent as a492 * single USB packet preceded by a 0x0F byte.493 */494static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,495 uint8_t *buffer, int buffer_length)496{497 if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)498 snd_usbmidi_standard_input(ep, buffer, buffer_length);499 else500 snd_usbmidi_input_data(ep, buffer[0] >> 4,501 &buffer[1], buffer_length - 1);502}503 504/*505 * Adds one USB MIDI packet to the output buffer.506 */507static void snd_usbmidi_output_standard_packet(struct urb *urb, uint8_t p0,508 uint8_t p1, uint8_t p2,509 uint8_t p3)510{511 512 uint8_t *buf =513 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;514 buf[0] = p0;515 buf[1] = p1;516 buf[2] = p2;517 buf[3] = p3;518 urb->transfer_buffer_length += 4;519}520 521/*522 * Adds one Midiman packet to the output buffer.523 */524static void snd_usbmidi_output_midiman_packet(struct urb *urb, uint8_t p0,525 uint8_t p1, uint8_t p2,526 uint8_t p3)527{528 529 uint8_t *buf =530 (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;531 buf[0] = p1;532 buf[1] = p2;533 buf[2] = p3;534 buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];535 urb->transfer_buffer_length += 4;536}537 538/*539 * Converts MIDI commands to USB MIDI packets.540 */541static void snd_usbmidi_transmit_byte(struct usbmidi_out_port *port,542 uint8_t b, struct urb *urb)543{544 uint8_t p0 = port->cable;545 void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =546 port->ep->umidi->usb_protocol_ops->output_packet;547 548 if (b >= 0xf8) {549 output_packet(urb, p0 | 0x0f, b, 0, 0);550 } else if (b >= 0xf0) {551 switch (b) {552 case 0xf0:553 port->data[0] = b;554 port->state = STATE_SYSEX_1;555 break;556 case 0xf1:557 case 0xf3:558 port->data[0] = b;559 port->state = STATE_1PARAM;560 break;561 case 0xf2:562 port->data[0] = b;563 port->state = STATE_2PARAM_1;564 break;565 case 0xf4:566 case 0xf5:567 port->state = STATE_UNKNOWN;568 break;569 case 0xf6:570 output_packet(urb, p0 | 0x05, 0xf6, 0, 0);571 port->state = STATE_UNKNOWN;572 break;573 case 0xf7:574 switch (port->state) {575 case STATE_SYSEX_0:576 output_packet(urb, p0 | 0x05, 0xf7, 0, 0);577 break;578 case STATE_SYSEX_1:579 output_packet(urb, p0 | 0x06, port->data[0],580 0xf7, 0);581 break;582 case STATE_SYSEX_2:583 output_packet(urb, p0 | 0x07, port->data[0],584 port->data[1], 0xf7);585 break;586 }587 port->state = STATE_UNKNOWN;588 break;589 }590 } else if (b >= 0x80) {591 port->data[0] = b;592 if (b >= 0xc0 && b <= 0xdf)593 port->state = STATE_1PARAM;594 else595 port->state = STATE_2PARAM_1;596 } else { /* b < 0x80 */597 switch (port->state) {598 case STATE_1PARAM:599 if (port->data[0] < 0xf0) {600 p0 |= port->data[0] >> 4;601 } else {602 p0 |= 0x02;603 port->state = STATE_UNKNOWN;604 }605 output_packet(urb, p0, port->data[0], b, 0);606 break;607 case STATE_2PARAM_1:608 port->data[1] = b;609 port->state = STATE_2PARAM_2;610 break;611 case STATE_2PARAM_2:612 if (port->data[0] < 0xf0) {613 p0 |= port->data[0] >> 4;614 port->state = STATE_2PARAM_1;615 } else {616 p0 |= 0x03;617 port->state = STATE_UNKNOWN;618 }619 output_packet(urb, p0, port->data[0], port->data[1], b);620 break;621 case STATE_SYSEX_0:622 port->data[0] = b;623 port->state = STATE_SYSEX_1;624 break;625 case STATE_SYSEX_1:626 port->data[1] = b;627 port->state = STATE_SYSEX_2;628 break;629 case STATE_SYSEX_2:630 output_packet(urb, p0 | 0x04, port->data[0],631 port->data[1], b);632 port->state = STATE_SYSEX_0;633 break;634 }635 }636}637 638static void snd_usbmidi_standard_output(struct snd_usb_midi_out_endpoint *ep,639 struct urb *urb)640{641 int p;642 643 /* FIXME: lower-numbered ports can starve higher-numbered ports */644 for (p = 0; p < 0x10; ++p) {645 struct usbmidi_out_port *port = &ep->ports[p];646 if (!port->active)647 continue;648 while (urb->transfer_buffer_length + 3 < ep->max_transfer) {649 uint8_t b;650 if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {651 port->active = 0;652 break;653 }654 snd_usbmidi_transmit_byte(port, b, urb);655 }656 }657}658 659static const struct usb_protocol_ops snd_usbmidi_standard_ops = {660 .input = snd_usbmidi_standard_input,661 .output = snd_usbmidi_standard_output,662 .output_packet = snd_usbmidi_output_standard_packet,663};664 665static const struct usb_protocol_ops snd_usbmidi_midiman_ops = {666 .input = snd_usbmidi_midiman_input,667 .output = snd_usbmidi_standard_output,668 .output_packet = snd_usbmidi_output_midiman_packet,669};670 671static const672struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {673 .input = snd_usbmidi_maudio_broken_running_status_input,674 .output = snd_usbmidi_standard_output,675 .output_packet = snd_usbmidi_output_standard_packet,676};677 678static const struct usb_protocol_ops snd_usbmidi_cme_ops = {679 .input = snd_usbmidi_cme_input,680 .output = snd_usbmidi_standard_output,681 .output_packet = snd_usbmidi_output_standard_packet,682};683 684static const struct usb_protocol_ops snd_usbmidi_ch345_broken_sysex_ops = {685 .input = ch345_broken_sysex_input,686 .output = snd_usbmidi_standard_output,687 .output_packet = snd_usbmidi_output_standard_packet,688};689 690/*691 * AKAI MPD16 protocol:692 *693 * For control port (endpoint 1):694 * ==============================695 * One or more chunks consisting of first byte of (0x10 | msg_len) and then a696 * SysEx message (msg_len=9 bytes long).697 *698 * For data port (endpoint 2):699 * ===========================700 * One or more chunks consisting of first byte of (0x20 | msg_len) and then a701 * MIDI message (msg_len bytes long)702 *703 * Messages sent: Active Sense, Note On, Poly Pressure, Control Change.704 */705static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep,706 uint8_t *buffer, int buffer_length)707{708 unsigned int pos = 0;709 unsigned int len = (unsigned int)buffer_length;710 while (pos < len) {711 unsigned int port = (buffer[pos] >> 4) - 1;712 unsigned int msg_len = buffer[pos] & 0x0f;713 pos++;714 if (pos + msg_len <= len && port < 2)715 snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len);716 pos += msg_len;717 }718}719 720#define MAX_AKAI_SYSEX_LEN 9721 722static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep,723 struct urb *urb)724{725 uint8_t *msg;726 int pos, end, count, buf_end;727 uint8_t tmp[MAX_AKAI_SYSEX_LEN];728 struct snd_rawmidi_substream *substream = ep->ports[0].substream;729 730 if (!ep->ports[0].active)731 return;732 733 msg = urb->transfer_buffer + urb->transfer_buffer_length;734 buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1;735 736 /* only try adding more data when there's space for at least 1 SysEx */737 while (urb->transfer_buffer_length < buf_end) {738 count = snd_rawmidi_transmit_peek(substream,739 tmp, MAX_AKAI_SYSEX_LEN);740 if (!count) {741 ep->ports[0].active = 0;742 return;743 }744 /* try to skip non-SysEx data */745 for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++)746 ;747 748 if (pos > 0) {749 snd_rawmidi_transmit_ack(substream, pos);750 continue;751 }752 753 /* look for the start or end marker */754 for (end = 1; end < count && tmp[end] < 0xF0; end++)755 ;756 757 /* next SysEx started before the end of current one */758 if (end < count && tmp[end] == 0xF0) {759 /* it's incomplete - drop it */760 snd_rawmidi_transmit_ack(substream, end);761 continue;762 }763 /* SysEx complete */764 if (end < count && tmp[end] == 0xF7) {765 /* queue it, ack it, and get the next one */766 count = end + 1;767 msg[0] = 0x10 | count;768 memcpy(&msg[1], tmp, count);769 snd_rawmidi_transmit_ack(substream, count);770 urb->transfer_buffer_length += count + 1;771 msg += count + 1;772 continue;773 }774 /* less than 9 bytes and no end byte - wait for more */775 if (count < MAX_AKAI_SYSEX_LEN) {776 ep->ports[0].active = 0;777 return;778 }779 /* 9 bytes and no end marker in sight - malformed, skip it */780 snd_rawmidi_transmit_ack(substream, count);781 }782}783 784static const struct usb_protocol_ops snd_usbmidi_akai_ops = {785 .input = snd_usbmidi_akai_input,786 .output = snd_usbmidi_akai_output,787};788 789/*790 * Novation USB MIDI protocol: number of data bytes is in the first byte791 * (when receiving) (+1!) or in the second byte (when sending); data begins792 * at the third byte.793 */794 795static void snd_usbmidi_novation_input(struct snd_usb_midi_in_endpoint *ep,796 uint8_t *buffer, int buffer_length)797{798 if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)799 return;800 snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);801}802 803static void snd_usbmidi_novation_output(struct snd_usb_midi_out_endpoint *ep,804 struct urb *urb)805{806 uint8_t *transfer_buffer;807 int count;808 809 if (!ep->ports[0].active)810 return;811 transfer_buffer = urb->transfer_buffer;812 count = snd_rawmidi_transmit(ep->ports[0].substream,813 &transfer_buffer[2],814 ep->max_transfer - 2);815 if (count < 1) {816 ep->ports[0].active = 0;817 return;818 }819 transfer_buffer[0] = 0;820 transfer_buffer[1] = count;821 urb->transfer_buffer_length = 2 + count;822}823 824static const struct usb_protocol_ops snd_usbmidi_novation_ops = {825 .input = snd_usbmidi_novation_input,826 .output = snd_usbmidi_novation_output,827};828 829/*830 * "raw" protocol: just move raw MIDI bytes from/to the endpoint831 */832 833static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint *ep,834 uint8_t *buffer, int buffer_length)835{836 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);837}838 839static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint *ep,840 struct urb *urb)841{842 int count;843 844 if (!ep->ports[0].active)845 return;846 count = snd_rawmidi_transmit(ep->ports[0].substream,847 urb->transfer_buffer,848 ep->max_transfer);849 if (count < 1) {850 ep->ports[0].active = 0;851 return;852 }853 urb->transfer_buffer_length = count;854}855 856static const struct usb_protocol_ops snd_usbmidi_raw_ops = {857 .input = snd_usbmidi_raw_input,858 .output = snd_usbmidi_raw_output,859};860 861/*862 * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes.863 */864 865static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint *ep,866 uint8_t *buffer, int buffer_length)867{868 if (buffer_length > 2)869 snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2);870}871 872static const struct usb_protocol_ops snd_usbmidi_ftdi_ops = {873 .input = snd_usbmidi_ftdi_input,874 .output = snd_usbmidi_raw_output,875};876 877static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,878 uint8_t *buffer, int buffer_length)879{880 if (buffer_length != 9)881 return;882 buffer_length = 8;883 while (buffer_length && buffer[buffer_length - 1] == 0xFD)884 buffer_length--;885 if (buffer_length)886 snd_usbmidi_input_data(ep, 0, buffer, buffer_length);887}888 889static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,890 struct urb *urb)891{892 int count;893 894 if (!ep->ports[0].active)895 return;896 switch (snd_usb_get_speed(ep->umidi->dev)) {897 case USB_SPEED_HIGH:898 case USB_SPEED_SUPER:899 case USB_SPEED_SUPER_PLUS:900 count = 1;901 break;902 default:903 count = 2;904 }905 count = snd_rawmidi_transmit(ep->ports[0].substream,906 urb->transfer_buffer,907 count);908 if (count < 1) {909 ep->ports[0].active = 0;910 return;911 }912 913 memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count);914 urb->transfer_buffer_length = ep->max_transfer;915}916 917static const struct usb_protocol_ops snd_usbmidi_122l_ops = {918 .input = snd_usbmidi_us122l_input,919 .output = snd_usbmidi_us122l_output,920};921 922/*923 * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.924 */925 926static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint *ep)927{928 static const u8 init_data[] = {929 /* initialization magic: "get version" */930 0xf0,931 0x00, 0x20, 0x31, /* Emagic */932 0x64, /* Unitor8 */933 0x0b, /* version number request */934 0x00, /* command version */935 0x00, /* EEPROM, box 0 */936 0xf7937 };938 send_bulk_static_data(ep, init_data, sizeof(init_data));939 /* while we're at it, pour on more magic */940 send_bulk_static_data(ep, init_data, sizeof(init_data));941}942 943static void snd_usbmidi_emagic_finish_out(struct snd_usb_midi_out_endpoint *ep)944{945 static const u8 finish_data[] = {946 /* switch to patch mode with last preset */947 0xf0,948 0x00, 0x20, 0x31, /* Emagic */949 0x64, /* Unitor8 */950 0x10, /* patch switch command */951 0x00, /* command version */952 0x7f, /* to all boxes */953 0x40, /* last preset in EEPROM */954 0xf7955 };956 send_bulk_static_data(ep, finish_data, sizeof(finish_data));957}958 959static void snd_usbmidi_emagic_input(struct snd_usb_midi_in_endpoint *ep,960 uint8_t *buffer, int buffer_length)961{962 int i;963 964 /* FF indicates end of valid data */965 for (i = 0; i < buffer_length; ++i)966 if (buffer[i] == 0xff) {967 buffer_length = i;968 break;969 }970 971 /* handle F5 at end of last buffer */972 if (ep->seen_f5)973 goto switch_port;974 975 while (buffer_length > 0) {976 /* determine size of data until next F5 */977 for (i = 0; i < buffer_length; ++i)978 if (buffer[i] == 0xf5)979 break;980 snd_usbmidi_input_data(ep, ep->current_port, buffer, i);981 buffer += i;982 buffer_length -= i;983 984 if (buffer_length <= 0)985 break;986 /* assert(buffer[0] == 0xf5); */987 ep->seen_f5 = 1;988 ++buffer;989 --buffer_length;990 991 switch_port:992 if (buffer_length <= 0)993 break;994 if (buffer[0] < 0x80) {995 ep->current_port = (buffer[0] - 1) & 15;996 ++buffer;997 --buffer_length;998 }999 ep->seen_f5 = 0;1000 }1001}1002 1003static void snd_usbmidi_emagic_output(struct snd_usb_midi_out_endpoint *ep,1004 struct urb *urb)1005{1006 int port0 = ep->current_port;1007 uint8_t *buf = urb->transfer_buffer;1008 int buf_free = ep->max_transfer;1009 int length, i;1010 1011 for (i = 0; i < 0x10; ++i) {1012 /* round-robin, starting at the last current port */1013 int portnum = (port0 + i) & 15;1014 struct usbmidi_out_port *port = &ep->ports[portnum];1015 1016 if (!port->active)1017 continue;1018 if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {1019 port->active = 0;1020 continue;1021 }1022 1023 if (portnum != ep->current_port) {1024 if (buf_free < 2)1025 break;1026 ep->current_port = portnum;1027 buf[0] = 0xf5;1028 buf[1] = (portnum + 1) & 15;1029 buf += 2;1030 buf_free -= 2;1031 }1032 1033 if (buf_free < 1)1034 break;1035 length = snd_rawmidi_transmit(port->substream, buf, buf_free);1036 if (length > 0) {1037 buf += length;1038 buf_free -= length;1039 if (buf_free < 1)1040 break;1041 }1042 }1043 if (buf_free < ep->max_transfer && buf_free > 0) {1044 *buf = 0xff;1045 --buf_free;1046 }1047 urb->transfer_buffer_length = ep->max_transfer - buf_free;1048}1049 1050static const struct usb_protocol_ops snd_usbmidi_emagic_ops = {1051 .input = snd_usbmidi_emagic_input,1052 .output = snd_usbmidi_emagic_output,1053 .init_out_endpoint = snd_usbmidi_emagic_init_out,1054 .finish_out_endpoint = snd_usbmidi_emagic_finish_out,1055};1056 1057 1058static void update_roland_altsetting(struct snd_usb_midi *umidi)1059{1060 struct usb_interface *intf;1061 struct usb_host_interface *hostif;1062 struct usb_interface_descriptor *intfd;1063 int is_light_load;1064 1065 intf = umidi->iface;1066 is_light_load = intf->cur_altsetting != intf->altsetting;1067 if (umidi->roland_load_ctl->private_value == is_light_load)1068 return;1069 hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];1070 intfd = get_iface_desc(hostif);1071 snd_usbmidi_input_stop(&umidi->list);1072 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,1073 intfd->bAlternateSetting);1074 snd_usbmidi_input_start(&umidi->list);1075}1076 1077static int substream_open(struct snd_rawmidi_substream *substream, int dir,1078 int open)1079{1080 struct snd_usb_midi *umidi = substream->rmidi->private_data;1081 struct snd_kcontrol *ctl;1082 1083 down_read(&umidi->disc_rwsem);1084 if (umidi->disconnected) {1085 up_read(&umidi->disc_rwsem);1086 return open ? -ENODEV : 0;1087 }1088 1089 mutex_lock(&umidi->mutex);1090 if (open) {1091 if (!umidi->opened[0] && !umidi->opened[1]) {1092 if (umidi->roland_load_ctl) {1093 ctl = umidi->roland_load_ctl;1094 ctl->vd[0].access |=1095 SNDRV_CTL_ELEM_ACCESS_INACTIVE;1096 snd_ctl_notify(umidi->card,1097 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);1098 update_roland_altsetting(umidi);1099 }1100 }1101 umidi->opened[dir]++;1102 if (umidi->opened[1])1103 snd_usbmidi_input_start(&umidi->list);1104 } else {1105 umidi->opened[dir]--;1106 if (!umidi->opened[1])1107 snd_usbmidi_input_stop(&umidi->list);1108 if (!umidi->opened[0] && !umidi->opened[1]) {1109 if (umidi->roland_load_ctl) {1110 ctl = umidi->roland_load_ctl;1111 ctl->vd[0].access &=1112 ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;1113 snd_ctl_notify(umidi->card,1114 SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);1115 }1116 }1117 }1118 mutex_unlock(&umidi->mutex);1119 up_read(&umidi->disc_rwsem);1120 return 0;1121}1122 1123static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)1124{1125 struct snd_usb_midi *umidi = substream->rmidi->private_data;1126 struct usbmidi_out_port *port = NULL;1127 int i, j;1128 1129 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)1130 if (umidi->endpoints[i].out)1131 for (j = 0; j < 0x10; ++j)1132 if (umidi->endpoints[i].out->ports[j].substream == substream) {1133 port = &umidi->endpoints[i].out->ports[j];1134 break;1135 }1136 if (!port)1137 return -ENXIO;1138 1139 substream->runtime->private_data = port;1140 port->state = STATE_UNKNOWN;1141 return substream_open(substream, 0, 1);1142}1143 1144static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)1145{1146 struct usbmidi_out_port *port = substream->runtime->private_data;1147 1148 cancel_work_sync(&port->ep->work);1149 return substream_open(substream, 0, 0);1150}1151 1152static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream,1153 int up)1154{1155 struct usbmidi_out_port *port =1156 (struct usbmidi_out_port *)substream->runtime->private_data;1157 1158 port->active = up;1159 if (up) {1160 if (port->ep->umidi->disconnected) {1161 /* gobble up remaining bytes to prevent wait in1162 * snd_rawmidi_drain_output */1163 snd_rawmidi_proceed(substream);1164 return;1165 }1166 queue_work(system_highpri_wq, &port->ep->work);1167 }1168}1169 1170static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)1171{1172 struct usbmidi_out_port *port = substream->runtime->private_data;1173 struct snd_usb_midi_out_endpoint *ep = port->ep;1174 unsigned int drain_urbs;1175 DEFINE_WAIT(wait);1176 long timeout = msecs_to_jiffies(50);1177 1178 if (ep->umidi->disconnected)1179 return;1180 /*1181 * The substream buffer is empty, but some data might still be in the1182 * currently active URBs, so we have to wait for those to complete.1183 */1184 spin_lock_irq(&ep->buffer_lock);1185 drain_urbs = ep->active_urbs;1186 if (drain_urbs) {1187 ep->drain_urbs |= drain_urbs;1188 do {1189 prepare_to_wait(&ep->drain_wait, &wait,1190 TASK_UNINTERRUPTIBLE);1191 spin_unlock_irq(&ep->buffer_lock);1192 timeout = schedule_timeout(timeout);1193 spin_lock_irq(&ep->buffer_lock);1194 drain_urbs &= ep->drain_urbs;1195 } while (drain_urbs && timeout);1196 finish_wait(&ep->drain_wait, &wait);1197 }1198 port->active = 0;1199 spin_unlock_irq(&ep->buffer_lock);1200}1201 1202static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)1203{1204 return substream_open(substream, 1, 1);1205}1206 1207static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)1208{1209 return substream_open(substream, 1, 0);1210}1211 1212static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream,1213 int up)1214{1215 struct snd_usb_midi *umidi = substream->rmidi->private_data;1216 1217 if (up)1218 set_bit(substream->number, &umidi->input_triggered);1219 else1220 clear_bit(substream->number, &umidi->input_triggered);1221}1222 1223static const struct snd_rawmidi_ops snd_usbmidi_output_ops = {1224 .open = snd_usbmidi_output_open,1225 .close = snd_usbmidi_output_close,1226 .trigger = snd_usbmidi_output_trigger,1227 .drain = snd_usbmidi_output_drain,1228};1229 1230static const struct snd_rawmidi_ops snd_usbmidi_input_ops = {1231 .open = snd_usbmidi_input_open,1232 .close = snd_usbmidi_input_close,1233 .trigger = snd_usbmidi_input_trigger1234};1235 1236static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,1237 unsigned int buffer_length)1238{1239 usb_free_coherent(umidi->dev, buffer_length,1240 urb->transfer_buffer, urb->transfer_dma);1241 usb_free_urb(urb);1242}1243 1244/*1245 * Frees an input endpoint.1246 * May be called when ep hasn't been initialized completely.1247 */1248static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint *ep)1249{1250 unsigned int i;1251 1252 for (i = 0; i < INPUT_URBS; ++i)1253 if (ep->urbs[i])1254 free_urb_and_buffer(ep->umidi, ep->urbs[i],1255 ep->urbs[i]->transfer_buffer_length);1256 kfree(ep);1257}1258 1259/*1260 * Creates an input endpoint.1261 */1262static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi *umidi,1263 struct snd_usb_midi_endpoint_info *ep_info,1264 struct snd_usb_midi_endpoint *rep)1265{1266 struct snd_usb_midi_in_endpoint *ep;1267 void *buffer;1268 unsigned int pipe;1269 int length;1270 unsigned int i;1271 int err;1272 1273 rep->in = NULL;1274 ep = kzalloc(sizeof(*ep), GFP_KERNEL);1275 if (!ep)1276 return -ENOMEM;1277 ep->umidi = umidi;1278 1279 for (i = 0; i < INPUT_URBS; ++i) {1280 ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);1281 if (!ep->urbs[i]) {1282 err = -ENOMEM;1283 goto error;1284 }1285 }1286 if (ep_info->in_interval)1287 pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);1288 else1289 pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);1290 length = usb_maxpacket(umidi->dev, pipe);1291 for (i = 0; i < INPUT_URBS; ++i) {1292 buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL,1293 &ep->urbs[i]->transfer_dma);1294 if (!buffer) {1295 err = -ENOMEM;1296 goto error;1297 }1298 if (ep_info->in_interval)1299 usb_fill_int_urb(ep->urbs[i], umidi->dev,1300 pipe, buffer, length,1301 snd_usbmidi_in_urb_complete,1302 ep, ep_info->in_interval);1303 else1304 usb_fill_bulk_urb(ep->urbs[i], umidi->dev,1305 pipe, buffer, length,1306 snd_usbmidi_in_urb_complete, ep);1307 ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;1308 err = usb_urb_ep_type_check(ep->urbs[i]);1309 if (err < 0) {1310 dev_err(&umidi->dev->dev, "invalid MIDI in EP %x\n",1311 ep_info->in_ep);1312 goto error;1313 }1314 }1315 1316 rep->in = ep;1317 return 0;1318 1319 error:1320 snd_usbmidi_in_endpoint_delete(ep);1321 return err;1322}1323 1324/*1325 * Frees an output endpoint.1326 * May be called when ep hasn't been initialized completely.1327 */1328static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)1329{1330 unsigned int i;1331 1332 for (i = 0; i < OUTPUT_URBS; ++i)1333 if (ep->urbs[i].urb) {1334 free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,1335 ep->max_transfer);1336 ep->urbs[i].urb = NULL;1337 }1338}1339 1340static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)1341{1342 snd_usbmidi_out_endpoint_clear(ep);1343 kfree(ep);1344}1345 1346/*1347 * Creates an output endpoint, and initializes output ports.1348 */1349static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi,1350 struct snd_usb_midi_endpoint_info *ep_info,1351 struct snd_usb_midi_endpoint *rep)1352{1353 struct snd_usb_midi_out_endpoint *ep;1354 unsigned int i;1355 unsigned int pipe;1356 void *buffer;1357 int err;1358 1359 rep->out = NULL;1360 ep = kzalloc(sizeof(*ep), GFP_KERNEL);1361 if (!ep)1362 return -ENOMEM;1363 ep->umidi = umidi;1364 1365 for (i = 0; i < OUTPUT_URBS; ++i) {1366 ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);1367 if (!ep->urbs[i].urb) {1368 err = -ENOMEM;1369 goto error;1370 }1371 ep->urbs[i].ep = ep;1372 }1373 if (ep_info->out_interval)1374 pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);1375 else1376 pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);1377 switch (umidi->usb_id) {1378 default:1379 ep->max_transfer = usb_maxpacket(umidi->dev, pipe);1380 break;1381 /*1382 * Various chips declare a packet size larger than 4 bytes, but1383 * do not actually work with larger packets:1384 */1385 case USB_ID(0x0a67, 0x5011): /* Medeli DD305 */1386 case USB_ID(0x0a92, 0x1020): /* ESI M4U */1387 case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */1388 case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */1389 case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */1390 case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */1391 case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */1392 ep->max_transfer = 4;1393 break;1394 /*1395 * Some devices only work with 9 bytes packet size:1396 */1397 case USB_ID(0x0644, 0x800e): /* Tascam US-122L */1398 case USB_ID(0x0644, 0x800f): /* Tascam US-144 */1399 ep->max_transfer = 9;1400 break;1401 }1402 for (i = 0; i < OUTPUT_URBS; ++i) {1403 buffer = usb_alloc_coherent(umidi->dev,1404 ep->max_transfer, GFP_KERNEL,1405 &ep->urbs[i].urb->transfer_dma);1406 if (!buffer) {1407 err = -ENOMEM;1408 goto error;1409 }1410 if (ep_info->out_interval)1411 usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,1412 pipe, buffer, ep->max_transfer,1413 snd_usbmidi_out_urb_complete,1414 &ep->urbs[i], ep_info->out_interval);1415 else1416 usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,1417 pipe, buffer, ep->max_transfer,1418 snd_usbmidi_out_urb_complete,1419 &ep->urbs[i]);1420 err = usb_urb_ep_type_check(ep->urbs[i].urb);1421 if (err < 0) {1422 dev_err(&umidi->dev->dev, "invalid MIDI out EP %x\n",1423 ep_info->out_ep);1424 goto error;1425 }1426 ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;1427 }1428 1429 spin_lock_init(&ep->buffer_lock);1430 INIT_WORK(&ep->work, snd_usbmidi_out_work);1431 init_waitqueue_head(&ep->drain_wait);1432 1433 for (i = 0; i < 0x10; ++i)1434 if (ep_info->out_cables & (1 << i)) {1435 ep->ports[i].ep = ep;1436 ep->ports[i].cable = i << 4;1437 }1438 1439 if (umidi->usb_protocol_ops->init_out_endpoint)1440 umidi->usb_protocol_ops->init_out_endpoint(ep);1441 1442 rep->out = ep;1443 return 0;1444 1445 error:1446 snd_usbmidi_out_endpoint_delete(ep);1447 return err;1448}1449 1450/*1451 * Frees everything.1452 */1453static void snd_usbmidi_free(struct snd_usb_midi *umidi)1454{1455 int i;1456 1457 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {1458 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];1459 if (ep->out)1460 snd_usbmidi_out_endpoint_delete(ep->out);1461 if (ep->in)1462 snd_usbmidi_in_endpoint_delete(ep->in);1463 }1464 mutex_destroy(&umidi->mutex);1465 kfree(umidi);1466}1467 1468/*1469 * Unlinks all URBs (must be done before the usb_device is deleted).1470 */1471void snd_usbmidi_disconnect(struct list_head *p)1472{1473 struct snd_usb_midi *umidi;1474 unsigned int i, j;1475 1476 umidi = list_entry(p, struct snd_usb_midi, list);1477 /*1478 * an URB's completion handler may start the timer and1479 * a timer may submit an URB. To reliably break the cycle1480 * a flag under lock must be used1481 */1482 down_write(&umidi->disc_rwsem);1483 spin_lock_irq(&umidi->disc_lock);1484 umidi->disconnected = 1;1485 spin_unlock_irq(&umidi->disc_lock);1486 up_write(&umidi->disc_rwsem);1487 1488 del_timer_sync(&umidi->error_timer);1489 1490 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {1491 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];1492 if (ep->out)1493 cancel_work_sync(&ep->out->work);1494 if (ep->out) {1495 for (j = 0; j < OUTPUT_URBS; ++j)1496 usb_kill_urb(ep->out->urbs[j].urb);1497 if (umidi->usb_protocol_ops->finish_out_endpoint)1498 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);1499 ep->out->active_urbs = 0;1500 if (ep->out->drain_urbs) {1501 ep->out->drain_urbs = 0;1502 wake_up(&ep->out->drain_wait);1503 }1504 }1505 if (ep->in)1506 for (j = 0; j < INPUT_URBS; ++j)1507 usb_kill_urb(ep->in->urbs[j]);1508 /* free endpoints here; later call can result in Oops */1509 if (ep->out)1510 snd_usbmidi_out_endpoint_clear(ep->out);1511 if (ep->in) {1512 snd_usbmidi_in_endpoint_delete(ep->in);1513 ep->in = NULL;1514 }1515 }1516}1517EXPORT_SYMBOL(snd_usbmidi_disconnect);1518 1519static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)1520{1521 struct snd_usb_midi *umidi = rmidi->private_data;1522 snd_usbmidi_free(umidi);1523}1524 1525static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi *umidi,1526 int stream,1527 int number)1528{1529 struct snd_rawmidi_substream *substream;1530 1531 list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams,1532 list) {1533 if (substream->number == number)1534 return substream;1535 }1536 return NULL;1537}1538 1539/*1540 * This list specifies names for ports that do not fit into the standard1541 * "(product) MIDI (n)" schema because they aren't external MIDI ports,1542 * such as internal control or synthesizer ports.1543 */1544static struct port_info {1545 u32 id;1546 short int port;1547 short int voices;1548 const char *name;1549 unsigned int seq_flags;1550} snd_usbmidi_port_info[] = {1551#define PORT_INFO(vendor, product, num, name_, voices_, flags) \1552 { .id = USB_ID(vendor, product), \1553 .port = num, .voices = voices_, \1554 .name = name_, .seq_flags = flags }1555#define EXTERNAL_PORT(vendor, product, num, name) \1556 PORT_INFO(vendor, product, num, name, 0, \1557 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \1558 SNDRV_SEQ_PORT_TYPE_HARDWARE | \1559 SNDRV_SEQ_PORT_TYPE_PORT)1560#define CONTROL_PORT(vendor, product, num, name) \1561 PORT_INFO(vendor, product, num, name, 0, \1562 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \1563 SNDRV_SEQ_PORT_TYPE_HARDWARE)1564#define GM_SYNTH_PORT(vendor, product, num, name, voices) \1565 PORT_INFO(vendor, product, num, name, voices, \1566 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \1567 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \1568 SNDRV_SEQ_PORT_TYPE_HARDWARE | \1569 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)1570#define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \1571 PORT_INFO(vendor, product, num, name, voices, \1572 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \1573 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \1574 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \1575 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \1576 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \1577 SNDRV_SEQ_PORT_TYPE_HARDWARE | \1578 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)1579#define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \1580 PORT_INFO(vendor, product, num, name, voices, \1581 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \1582 SNDRV_SEQ_PORT_TYPE_MIDI_GM | \1583 SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \1584 SNDRV_SEQ_PORT_TYPE_MIDI_GS | \1585 SNDRV_SEQ_PORT_TYPE_MIDI_XG | \1586 SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \1587 SNDRV_SEQ_PORT_TYPE_HARDWARE | \1588 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)1589 /* Yamaha MOTIF XF */1590 GM_SYNTH_PORT(0x0499, 0x105c, 0, "%s Tone Generator", 128),1591 CONTROL_PORT(0x0499, 0x105c, 1, "%s Remote Control"),1592 EXTERNAL_PORT(0x0499, 0x105c, 2, "%s Thru"),1593 CONTROL_PORT(0x0499, 0x105c, 3, "%s Editor"),1594 /* Roland UA-100 */1595 CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),1596 /* Roland SC-8850 */1597 SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),1598 SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),1599 SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),1600 SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),1601 EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),1602 EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),1603 /* Roland U-8 */1604 EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),1605 CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),1606 /* Roland SC-8820 */1607 SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),1608 SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),1609 EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),1610 /* Roland SK-500 */1611 SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),1612 SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),1613 EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),1614 /* Roland SC-D70 */1615 SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),1616 SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),1617 EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),1618 /* Edirol UM-880 */1619 CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),1620 /* Edirol SD-90 */1621 ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),1622 ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),1623 EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),1624 EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),1625 /* Edirol UM-550 */1626 CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),1627 /* Edirol SD-20 */1628 ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),1629 ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),1630 EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),1631 /* Edirol SD-80 */1632 ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),1633 ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),1634 EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),1635 EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),1636 /* Edirol UA-700 */1637 EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),1638 CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),1639 /* Roland VariOS */1640 EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),1641 EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),1642 EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),1643 /* Edirol PCR */1644 EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),1645 EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),1646 EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),1647 /* BOSS GS-10 */1648 EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),1649 CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),1650 /* Edirol UA-1000 */1651 EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),1652 CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),1653 /* Edirol UR-80 */1654 EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),1655 EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),1656 EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),1657 /* Edirol PCR-A */1658 EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),1659 EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),1660 EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),1661 /* BOSS GT-PRO */1662 CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"),1663 /* Edirol UM-3EX */1664 CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),1665 /* Roland VG-99 */1666 CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"),1667 EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"),1668 /* Cakewalk Sonar V-Studio 100 */1669 EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"),1670 CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"),1671 /* Roland VB-99 */1672 CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"),1673 EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"),1674 /* Roland A-PRO */1675 EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"),1676 CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"),1677 CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"),1678 /* Roland SD-50 */1679 ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128),1680 EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"),1681 CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"),1682 /* Roland OCTA-CAPTURE */1683 EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"),1684 CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"),1685 EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"),1686 CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"),1687 /* Roland SPD-SX */1688 CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"),1689 EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"),1690 /* Roland A-Series */1691 CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"),1692 EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"),1693 /* Roland INTEGRA-7 */1694 ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128),1695 CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"),1696 /* M-Audio MidiSport 8x8 */1697 CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),1698 CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),1699 /* MOTU Fastlane */1700 EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),1701 EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),1702 /* Emagic Unitor8/AMT8/MT4 */1703 EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),1704 EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),1705 EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),1706 /* Akai MPD16 */1707 CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"),1708 PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0,1709 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |1710 SNDRV_SEQ_PORT_TYPE_HARDWARE),1711 /* Access Music Virus TI */1712 EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),1713 PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,1714 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |1715 SNDRV_SEQ_PORT_TYPE_HARDWARE |1716 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),1717};1718 1719static struct port_info *find_port_info(struct snd_usb_midi *umidi, int number)1720{1721 int i;1722 1723 for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {1724 if (snd_usbmidi_port_info[i].id == umidi->usb_id &&1725 snd_usbmidi_port_info[i].port == number)1726 return &snd_usbmidi_port_info[i];1727 }1728 return NULL;1729}1730 1731static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,1732 struct snd_seq_port_info *seq_port_info)1733{1734 struct snd_usb_midi *umidi = rmidi->private_data;1735 struct port_info *port_info;1736 1737 /* TODO: read port flags from descriptors */1738 port_info = find_port_info(umidi, number);1739 if (port_info) {1740 seq_port_info->type = port_info->seq_flags;1741 seq_port_info->midi_voices = port_info->voices;1742 }1743}1744 1745/* return iJack for the corresponding jackID */1746static int find_usb_ijack(struct usb_host_interface *hostif, uint8_t jack_id)1747{1748 unsigned char *extra = hostif->extra;1749 int extralen = hostif->extralen;1750 struct usb_descriptor_header *h;1751 struct usb_midi_out_jack_descriptor *outjd;1752 struct usb_midi_in_jack_descriptor *injd;1753 size_t sz;1754 1755 while (extralen > 4) {1756 h = (struct usb_descriptor_header *)extra;1757 if (h->bDescriptorType != USB_DT_CS_INTERFACE)1758 goto next;1759 1760 outjd = (struct usb_midi_out_jack_descriptor *)h;1761 if (h->bLength >= sizeof(*outjd) &&1762 outjd->bDescriptorSubtype == UAC_MIDI_OUT_JACK &&1763 outjd->bJackID == jack_id) {1764 sz = USB_DT_MIDI_OUT_SIZE(outjd->bNrInputPins);1765 if (outjd->bLength < sz)1766 goto next;1767 return *(extra + sz - 1);1768 }1769 1770 injd = (struct usb_midi_in_jack_descriptor *)h;1771 if (injd->bLength >= sizeof(*injd) &&1772 injd->bDescriptorSubtype == UAC_MIDI_IN_JACK &&1773 injd->bJackID == jack_id)1774 return injd->iJack;1775 1776next:1777 if (!extra[0])1778 break;1779 extralen -= extra[0];1780 extra += extra[0];1781 }1782 return 0;1783}1784 1785static void snd_usbmidi_init_substream(struct snd_usb_midi *umidi,1786 int stream, int number, int jack_id,1787 struct snd_rawmidi_substream **rsubstream)1788{1789 struct port_info *port_info;1790 const char *name_format;1791 struct usb_interface *intf;1792 struct usb_host_interface *hostif;1793 uint8_t jack_name_buf[32];1794 uint8_t *default_jack_name = "MIDI";1795 uint8_t *jack_name = default_jack_name;1796 uint8_t iJack;1797 int res;1798 1799 struct snd_rawmidi_substream *substream =1800 snd_usbmidi_find_substream(umidi, stream, number);1801 if (!substream) {1802 dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream,1803 number);1804 return;1805 }1806 1807 intf = umidi->iface;1808 if (intf && jack_id >= 0) {1809 hostif = intf->cur_altsetting;1810 iJack = find_usb_ijack(hostif, jack_id);1811 if (iJack != 0) {1812 res = usb_string(umidi->dev, iJack, jack_name_buf,1813 ARRAY_SIZE(jack_name_buf));1814 if (res)1815 jack_name = jack_name_buf;1816 }1817 }1818 1819 port_info = find_port_info(umidi, number);1820 name_format = port_info ? port_info->name :1821 (jack_name != default_jack_name ? "%s %s" : "%s %s %d");1822 snprintf(substream->name, sizeof(substream->name),1823 name_format, umidi->card->shortname, jack_name, number + 1);1824 1825 *rsubstream = substream;1826}1827 1828/*1829 * Creates the endpoints and their ports.1830 */1831static int snd_usbmidi_create_endpoints(struct snd_usb_midi *umidi,1832 struct snd_usb_midi_endpoint_info *endpoints)1833{1834 int i, j, err;1835 int out_ports = 0, in_ports = 0;1836 1837 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {1838 if (endpoints[i].out_cables) {1839 err = snd_usbmidi_out_endpoint_create(umidi,1840 &endpoints[i],1841 &umidi->endpoints[i]);1842 if (err < 0)1843 return err;1844 }1845 if (endpoints[i].in_cables) {1846 err = snd_usbmidi_in_endpoint_create(umidi,1847 &endpoints[i],1848 &umidi->endpoints[i]);1849 if (err < 0)1850 return err;1851 }1852 1853 for (j = 0; j < 0x10; ++j) {1854 if (endpoints[i].out_cables & (1 << j)) {1855 snd_usbmidi_init_substream(umidi,1856 SNDRV_RAWMIDI_STREAM_OUTPUT,1857 out_ports,1858 endpoints[i].assoc_out_jacks[j],1859 &umidi->endpoints[i].out->ports[j].substream);1860 ++out_ports;1861 }1862 if (endpoints[i].in_cables & (1 << j)) {1863 snd_usbmidi_init_substream(umidi,1864 SNDRV_RAWMIDI_STREAM_INPUT,1865 in_ports,1866 endpoints[i].assoc_in_jacks[j],1867 &umidi->endpoints[i].in->ports[j].substream);1868 ++in_ports;1869 }1870 }1871 }1872 dev_dbg(&umidi->dev->dev, "created %d output and %d input ports\n",1873 out_ports, in_ports);1874 return 0;1875}1876 1877static struct usb_ms_endpoint_descriptor *find_usb_ms_endpoint_descriptor(1878 struct usb_host_endpoint *hostep)1879{1880 unsigned char *extra = hostep->extra;1881 int extralen = hostep->extralen;1882 1883 while (extralen > 3) {1884 struct usb_ms_endpoint_descriptor *ms_ep =1885 (struct usb_ms_endpoint_descriptor *)extra;1886 1887 if (ms_ep->bLength > 3 &&1888 ms_ep->bDescriptorType == USB_DT_CS_ENDPOINT &&1889 ms_ep->bDescriptorSubtype == UAC_MS_GENERAL)1890 return ms_ep;1891 if (!extra[0])1892 break;1893 extralen -= extra[0];1894 extra += extra[0];1895 }1896 return NULL;1897}1898 1899/*1900 * Returns MIDIStreaming device capabilities.1901 */1902static int snd_usbmidi_get_ms_info(struct snd_usb_midi *umidi,1903 struct snd_usb_midi_endpoint_info *endpoints)1904{1905 struct usb_interface *intf;1906 struct usb_host_interface *hostif;1907 struct usb_interface_descriptor *intfd;1908 struct usb_ms_header_descriptor *ms_header;1909 struct usb_host_endpoint *hostep;1910 struct usb_endpoint_descriptor *ep;1911 struct usb_ms_endpoint_descriptor *ms_ep;1912 int i, j, epidx;1913 1914 intf = umidi->iface;1915 if (!intf)1916 return -ENXIO;1917 hostif = &intf->altsetting[0];1918 intfd = get_iface_desc(hostif);1919 ms_header = (struct usb_ms_header_descriptor *)hostif->extra;1920 if (hostif->extralen >= 7 &&1921 ms_header->bLength >= 7 &&1922 ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&1923 ms_header->bDescriptorSubtype == UAC_HEADER)1924 dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n",1925 ((uint8_t *)&ms_header->bcdMSC)[1], ((uint8_t *)&ms_header->bcdMSC)[0]);1926 else1927 dev_warn(&umidi->dev->dev,1928 "MIDIStreaming interface descriptor not found\n");1929 1930 epidx = 0;1931 for (i = 0; i < intfd->bNumEndpoints; ++i) {1932 hostep = &hostif->endpoint[i];1933 ep = get_ep_desc(hostep);1934 if (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))1935 continue;1936 ms_ep = find_usb_ms_endpoint_descriptor(hostep);1937 if (!ms_ep)1938 continue;1939 if (ms_ep->bLength <= sizeof(*ms_ep))1940 continue;1941 if (ms_ep->bNumEmbMIDIJack > 0x10)1942 continue;1943 if (ms_ep->bLength < sizeof(*ms_ep) + ms_ep->bNumEmbMIDIJack)1944 continue;1945 if (usb_endpoint_dir_out(ep)) {1946 if (endpoints[epidx].out_ep) {1947 if (++epidx >= MIDI_MAX_ENDPOINTS) {1948 dev_warn(&umidi->dev->dev,1949 "too many endpoints\n");1950 break;1951 }1952 }1953 endpoints[epidx].out_ep = usb_endpoint_num(ep);1954 if (usb_endpoint_xfer_int(ep))1955 endpoints[epidx].out_interval = ep->bInterval;1956 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)1957 /*1958 * Low speed bulk transfers don't exist, so1959 * force interrupt transfers for devices like1960 * ESI MIDI Mate that try to use them anyway.1961 */1962 endpoints[epidx].out_interval = 1;1963 endpoints[epidx].out_cables =1964 (1 << ms_ep->bNumEmbMIDIJack) - 1;1965 for (j = 0; j < ms_ep->bNumEmbMIDIJack; ++j)1966 endpoints[epidx].assoc_out_jacks[j] = ms_ep->baAssocJackID[j];1967 for (; j < ARRAY_SIZE(endpoints[epidx].assoc_out_jacks); ++j)1968 endpoints[epidx].assoc_out_jacks[j] = -1;1969 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",1970 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);1971 } else {1972 if (endpoints[epidx].in_ep) {1973 if (++epidx >= MIDI_MAX_ENDPOINTS) {1974 dev_warn(&umidi->dev->dev,1975 "too many endpoints\n");1976 break;1977 }1978 }1979 endpoints[epidx].in_ep = usb_endpoint_num(ep);1980 if (usb_endpoint_xfer_int(ep))1981 endpoints[epidx].in_interval = ep->bInterval;1982 else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)1983 endpoints[epidx].in_interval = 1;1984 endpoints[epidx].in_cables =1985 (1 << ms_ep->bNumEmbMIDIJack) - 1;1986 for (j = 0; j < ms_ep->bNumEmbMIDIJack; ++j)1987 endpoints[epidx].assoc_in_jacks[j] = ms_ep->baAssocJackID[j];1988 for (; j < ARRAY_SIZE(endpoints[epidx].assoc_in_jacks); ++j)1989 endpoints[epidx].assoc_in_jacks[j] = -1;1990 dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",1991 ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);1992 }1993 }1994 return 0;1995}1996 1997static int roland_load_info(struct snd_kcontrol *kcontrol,1998 struct snd_ctl_elem_info *info)1999{2000 static const char *const names[] = { "High Load", "Light Load" };2001 2002 return snd_ctl_enum_info(info, 1, 2, names);2003}2004 2005static int roland_load_get(struct snd_kcontrol *kcontrol,2006 struct snd_ctl_elem_value *value)2007{2008 value->value.enumerated.item[0] = kcontrol->private_value;2009 return 0;2010}2011 2012static int roland_load_put(struct snd_kcontrol *kcontrol,2013 struct snd_ctl_elem_value *value)2014{2015 struct snd_usb_midi *umidi = kcontrol->private_data;2016 int changed;2017 2018 if (value->value.enumerated.item[0] > 1)2019 return -EINVAL;2020 mutex_lock(&umidi->mutex);2021 changed = value->value.enumerated.item[0] != kcontrol->private_value;2022 if (changed)2023 kcontrol->private_value = value->value.enumerated.item[0];2024 mutex_unlock(&umidi->mutex);2025 return changed;2026}2027 2028static const struct snd_kcontrol_new roland_load_ctl = {2029 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,2030 .name = "MIDI Input Mode",2031 .info = roland_load_info,2032 .get = roland_load_get,2033 .put = roland_load_put,2034 .private_value = 1,2035};2036 2037/*2038 * On Roland devices, use the second alternate setting to be able to use2039 * the interrupt input endpoint.2040 */2041static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi *umidi)2042{2043 struct usb_interface *intf;2044 struct usb_host_interface *hostif;2045 struct usb_interface_descriptor *intfd;2046 2047 intf = umidi->iface;2048 if (!intf || intf->num_altsetting != 2)2049 return;2050 2051 hostif = &intf->altsetting[1];2052 intfd = get_iface_desc(hostif);2053 /* If either or both of the endpoints support interrupt transfer,2054 * then use the alternate setting2055 */2056 if (intfd->bNumEndpoints != 2 ||2057 !((get_endpoint(hostif, 0)->bmAttributes &2058 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT ||2059 (get_endpoint(hostif, 1)->bmAttributes &2060 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))2061 return;2062 2063 dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n",2064 intfd->bAlternateSetting);2065 usb_set_interface(umidi->dev, intfd->bInterfaceNumber,2066 intfd->bAlternateSetting);2067 2068 umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);2069 if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)2070 umidi->roland_load_ctl = NULL;2071}2072 2073/*2074 * Try to find any usable endpoints in the interface.2075 */2076static int snd_usbmidi_detect_endpoints(struct snd_usb_midi *umidi,2077 struct snd_usb_midi_endpoint_info *endpoint,2078 int max_endpoints)2079{2080 struct usb_interface *intf;2081 struct usb_host_interface *hostif;2082 struct usb_interface_descriptor *intfd;2083 struct usb_endpoint_descriptor *epd;2084 int i, out_eps = 0, in_eps = 0;2085 2086 if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)2087 snd_usbmidi_switch_roland_altsetting(umidi);2088 2089 if (endpoint[0].out_ep || endpoint[0].in_ep)2090 return 0;2091 2092 intf = umidi->iface;2093 if (!intf || intf->num_altsetting < 1)2094 return -ENOENT;2095 hostif = intf->cur_altsetting;2096 intfd = get_iface_desc(hostif);2097 2098 for (i = 0; i < intfd->bNumEndpoints; ++i) {2099 epd = get_endpoint(hostif, i);2100 if (!usb_endpoint_xfer_bulk(epd) &&2101 !usb_endpoint_xfer_int(epd))2102 continue;2103 if (out_eps < max_endpoints &&2104 usb_endpoint_dir_out(epd)) {2105 endpoint[out_eps].out_ep = usb_endpoint_num(epd);2106 if (usb_endpoint_xfer_int(epd))2107 endpoint[out_eps].out_interval = epd->bInterval;2108 ++out_eps;2109 }2110 if (in_eps < max_endpoints &&2111 usb_endpoint_dir_in(epd)) {2112 endpoint[in_eps].in_ep = usb_endpoint_num(epd);2113 if (usb_endpoint_xfer_int(epd))2114 endpoint[in_eps].in_interval = epd->bInterval;2115 ++in_eps;2116 }2117 }2118 return (out_eps || in_eps) ? 0 : -ENOENT;2119}2120 2121/*2122 * Detects the endpoints for one-port-per-endpoint protocols.2123 */2124static int snd_usbmidi_detect_per_port_endpoints(struct snd_usb_midi *umidi,2125 struct snd_usb_midi_endpoint_info *endpoints)2126{2127 int err, i;2128 2129 err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);2130 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {2131 if (endpoints[i].out_ep)2132 endpoints[i].out_cables = 0x0001;2133 if (endpoints[i].in_ep)2134 endpoints[i].in_cables = 0x0001;2135 }2136 return err;2137}2138 2139/*2140 * Detects the endpoints and ports of Yamaha devices.2141 */2142static int snd_usbmidi_detect_yamaha(struct snd_usb_midi *umidi,2143 struct snd_usb_midi_endpoint_info *endpoint)2144{2145 struct usb_interface *intf;2146 struct usb_host_interface *hostif;2147 struct usb_interface_descriptor *intfd;2148 uint8_t *cs_desc;2149 2150 intf = umidi->iface;2151 if (!intf)2152 return -ENOENT;2153 hostif = intf->altsetting;2154 intfd = get_iface_desc(hostif);2155 if (intfd->bNumEndpoints < 1)2156 return -ENOENT;2157 2158 /*2159 * For each port there is one MIDI_IN/OUT_JACK descriptor, not2160 * necessarily with any useful contents. So simply count 'em.2161 */2162 for (cs_desc = hostif->extra;2163 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;2164 cs_desc += cs_desc[0]) {2165 if (cs_desc[1] == USB_DT_CS_INTERFACE) {2166 if (cs_desc[2] == UAC_MIDI_IN_JACK)2167 endpoint->in_cables =2168 (endpoint->in_cables << 1) | 1;2169 else if (cs_desc[2] == UAC_MIDI_OUT_JACK)2170 endpoint->out_cables =2171 (endpoint->out_cables << 1) | 1;2172 }2173 }2174 if (!endpoint->in_cables && !endpoint->out_cables)2175 return -ENOENT;2176 2177 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);2178}2179 2180/*2181 * Detects the endpoints and ports of Roland devices.2182 */2183static int snd_usbmidi_detect_roland(struct snd_usb_midi *umidi,2184 struct snd_usb_midi_endpoint_info *endpoint)2185{2186 struct usb_interface *intf;2187 struct usb_host_interface *hostif;2188 u8 *cs_desc;2189 2190 intf = umidi->iface;2191 if (!intf)2192 return -ENOENT;2193 hostif = intf->altsetting;2194 /*2195 * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>,2196 * some have standard class descriptors, or both kinds, or neither.2197 */2198 for (cs_desc = hostif->extra;2199 cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;2200 cs_desc += cs_desc[0]) {2201 if (cs_desc[0] >= 6 &&2202 cs_desc[1] == USB_DT_CS_INTERFACE &&2203 cs_desc[2] == 0xf1 &&2204 cs_desc[3] == 0x02) {2205 if (cs_desc[4] > 0x10 || cs_desc[5] > 0x10)2206 continue;2207 endpoint->in_cables = (1 << cs_desc[4]) - 1;2208 endpoint->out_cables = (1 << cs_desc[5]) - 1;2209 return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);2210 } else if (cs_desc[0] >= 7 &&2211 cs_desc[1] == USB_DT_CS_INTERFACE &&2212 cs_desc[2] == UAC_HEADER) {2213 return snd_usbmidi_get_ms_info(umidi, endpoint);2214 }2215 }2216 2217 return -ENODEV;2218}2219 2220/*2221 * Creates the endpoints and their ports for Midiman devices.2222 */2223static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi *umidi,2224 struct snd_usb_midi_endpoint_info *endpoint)2225{2226 struct snd_usb_midi_endpoint_info ep_info;2227 struct usb_interface *intf;2228 struct usb_host_interface *hostif;2229 struct usb_interface_descriptor *intfd;2230 struct usb_endpoint_descriptor *epd;2231 int cable, err;2232 2233 intf = umidi->iface;2234 if (!intf)2235 return -ENOENT;2236 hostif = intf->altsetting;2237 intfd = get_iface_desc(hostif);2238 /*2239 * The various MidiSport devices have more or less random endpoint2240 * numbers, so we have to identify the endpoints by their index in2241 * the descriptor array, like the driver for that other OS does.2242 *2243 * There is one interrupt input endpoint for all input ports, one2244 * bulk output endpoint for even-numbered ports, and one for odd-2245 * numbered ports. Both bulk output endpoints have corresponding2246 * input bulk endpoints (at indices 1 and 3) which aren't used.2247 */2248 if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {2249 dev_dbg(&umidi->dev->dev, "not enough endpoints\n");2250 return -ENOENT;2251 }2252 2253 epd = get_endpoint(hostif, 0);2254 if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {2255 dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n");2256 return -ENXIO;2257 }2258 epd = get_endpoint(hostif, 2);2259 if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {2260 dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n");2261 return -ENXIO;2262 }2263 if (endpoint->out_cables > 0x0001) {2264 epd = get_endpoint(hostif, 4);2265 if (!usb_endpoint_dir_out(epd) ||2266 !usb_endpoint_xfer_bulk(epd)) {2267 dev_dbg(&umidi->dev->dev,2268 "endpoint[4] isn't bulk output\n");2269 return -ENXIO;2270 }2271 }2272 2273 ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress &2274 USB_ENDPOINT_NUMBER_MASK;2275 ep_info.out_interval = 0;2276 ep_info.out_cables = endpoint->out_cables & 0x5555;2277 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,2278 &umidi->endpoints[0]);2279 if (err < 0)2280 return err;2281 2282 ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress &2283 USB_ENDPOINT_NUMBER_MASK;2284 ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;2285 ep_info.in_cables = endpoint->in_cables;2286 err = snd_usbmidi_in_endpoint_create(umidi, &ep_info,2287 &umidi->endpoints[0]);2288 if (err < 0)2289 return err;2290 2291 if (endpoint->out_cables > 0x0001) {2292 ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress &2293 USB_ENDPOINT_NUMBER_MASK;2294 ep_info.out_cables = endpoint->out_cables & 0xaaaa;2295 err = snd_usbmidi_out_endpoint_create(umidi, &ep_info,2296 &umidi->endpoints[1]);2297 if (err < 0)2298 return err;2299 }2300 2301 for (cable = 0; cable < 0x10; ++cable) {2302 if (endpoint->out_cables & (1 << cable))2303 snd_usbmidi_init_substream(umidi,2304 SNDRV_RAWMIDI_STREAM_OUTPUT,2305 cable,2306 -1 /* prevent trying to find jack */,2307 &umidi->endpoints[cable & 1].out->ports[cable].substream);2308 if (endpoint->in_cables & (1 << cable))2309 snd_usbmidi_init_substream(umidi,2310 SNDRV_RAWMIDI_STREAM_INPUT,2311 cable,2312 -1 /* prevent trying to find jack */,2313 &umidi->endpoints[0].in->ports[cable].substream);2314 }2315 return 0;2316}2317 2318static const struct snd_rawmidi_global_ops snd_usbmidi_ops = {2319 .get_port_info = snd_usbmidi_get_port_info,2320};2321 2322static int snd_usbmidi_create_rawmidi(struct snd_usb_midi *umidi,2323 int out_ports, int in_ports)2324{2325 struct snd_rawmidi *rmidi;2326 int err;2327 2328 err = snd_rawmidi_new(umidi->card, "USB MIDI",2329 umidi->next_midi_device++,2330 out_ports, in_ports, &rmidi);2331 if (err < 0)2332 return err;2333 strcpy(rmidi->name, umidi->card->shortname);2334 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |2335 SNDRV_RAWMIDI_INFO_INPUT |2336 SNDRV_RAWMIDI_INFO_DUPLEX;2337 rmidi->ops = &snd_usbmidi_ops;2338 rmidi->private_data = umidi;2339 rmidi->private_free = snd_usbmidi_rawmidi_free;2340 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,2341 &snd_usbmidi_output_ops);2342 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,2343 &snd_usbmidi_input_ops);2344 2345 umidi->rmidi = rmidi;2346 return 0;2347}2348 2349/*2350 * Temporarily stop input.2351 */2352void snd_usbmidi_input_stop(struct list_head *p)2353{2354 struct snd_usb_midi *umidi;2355 unsigned int i, j;2356 2357 umidi = list_entry(p, struct snd_usb_midi, list);2358 if (!umidi->input_running)2359 return;2360 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {2361 struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];2362 if (ep->in)2363 for (j = 0; j < INPUT_URBS; ++j)2364 usb_kill_urb(ep->in->urbs[j]);2365 }2366 umidi->input_running = 0;2367}2368EXPORT_SYMBOL(snd_usbmidi_input_stop);2369 2370static void snd_usbmidi_input_start_ep(struct snd_usb_midi *umidi,2371 struct snd_usb_midi_in_endpoint *ep)2372{2373 unsigned int i;2374 unsigned long flags;2375 2376 if (!ep)2377 return;2378 for (i = 0; i < INPUT_URBS; ++i) {2379 struct urb *urb = ep->urbs[i];2380 spin_lock_irqsave(&umidi->disc_lock, flags);2381 if (!atomic_read(&urb->use_count)) {2382 urb->dev = ep->umidi->dev;2383 snd_usbmidi_submit_urb(urb, GFP_ATOMIC);2384 }2385 spin_unlock_irqrestore(&umidi->disc_lock, flags);2386 }2387}2388 2389/*2390 * Resume input after a call to snd_usbmidi_input_stop().2391 */2392void snd_usbmidi_input_start(struct list_head *p)2393{2394 struct snd_usb_midi *umidi;2395 int i;2396 2397 umidi = list_entry(p, struct snd_usb_midi, list);2398 if (umidi->input_running || !umidi->opened[1])2399 return;2400 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)2401 snd_usbmidi_input_start_ep(umidi, umidi->endpoints[i].in);2402 umidi->input_running = 1;2403}2404EXPORT_SYMBOL(snd_usbmidi_input_start);2405 2406/*2407 * Prepare for suspend. Typically called from the USB suspend callback.2408 */2409void snd_usbmidi_suspend(struct list_head *p)2410{2411 struct snd_usb_midi *umidi;2412 2413 umidi = list_entry(p, struct snd_usb_midi, list);2414 mutex_lock(&umidi->mutex);2415 snd_usbmidi_input_stop(p);2416 mutex_unlock(&umidi->mutex);2417}2418EXPORT_SYMBOL(snd_usbmidi_suspend);2419 2420/*2421 * Resume. Typically called from the USB resume callback.2422 */2423void snd_usbmidi_resume(struct list_head *p)2424{2425 struct snd_usb_midi *umidi;2426 2427 umidi = list_entry(p, struct snd_usb_midi, list);2428 mutex_lock(&umidi->mutex);2429 snd_usbmidi_input_start(p);2430 mutex_unlock(&umidi->mutex);2431}2432EXPORT_SYMBOL(snd_usbmidi_resume);2433 2434/*2435 * Creates and registers everything needed for a MIDI streaming interface.2436 */2437int __snd_usbmidi_create(struct snd_card *card,2438 struct usb_interface *iface,2439 struct list_head *midi_list,2440 const struct snd_usb_audio_quirk *quirk,2441 unsigned int usb_id,2442 unsigned int *num_rawmidis)2443{2444 struct snd_usb_midi *umidi;2445 struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];2446 int out_ports, in_ports;2447 int i, err;2448 2449 umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);2450 if (!umidi)2451 return -ENOMEM;2452 umidi->dev = interface_to_usbdev(iface);2453 umidi->card = card;2454 umidi->iface = iface;2455 umidi->quirk = quirk;2456 umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;2457 if (num_rawmidis)2458 umidi->next_midi_device = *num_rawmidis;2459 spin_lock_init(&umidi->disc_lock);2460 init_rwsem(&umidi->disc_rwsem);2461 mutex_init(&umidi->mutex);2462 if (!usb_id)2463 usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),2464 le16_to_cpu(umidi->dev->descriptor.idProduct));2465 umidi->usb_id = usb_id;2466 timer_setup(&umidi->error_timer, snd_usbmidi_error_timer, 0);2467 2468 /* detect the endpoint(s) to use */2469 memset(endpoints, 0, sizeof(endpoints));2470 switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {2471 case QUIRK_MIDI_STANDARD_INTERFACE:2472 err = snd_usbmidi_get_ms_info(umidi, endpoints);2473 if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */2474 umidi->usb_protocol_ops =2475 &snd_usbmidi_maudio_broken_running_status_ops;2476 break;2477 case QUIRK_MIDI_US122L:2478 umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;2479 fallthrough;2480 case QUIRK_MIDI_FIXED_ENDPOINT:2481 memcpy(&endpoints[0], quirk->data,2482 sizeof(struct snd_usb_midi_endpoint_info));2483 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);2484 break;2485 case QUIRK_MIDI_YAMAHA:2486 err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);2487 break;2488 case QUIRK_MIDI_ROLAND:2489 err = snd_usbmidi_detect_roland(umidi, &endpoints[0]);2490 break;2491 case QUIRK_MIDI_MIDIMAN:2492 umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;2493 memcpy(&endpoints[0], quirk->data,2494 sizeof(struct snd_usb_midi_endpoint_info));2495 err = 0;2496 break;2497 case QUIRK_MIDI_NOVATION:2498 umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;2499 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);2500 break;2501 case QUIRK_MIDI_RAW_BYTES:2502 umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;2503 /*2504 * Interface 1 contains isochronous endpoints, but with the same2505 * numbers as in interface 0. Since it is interface 1 that the2506 * USB core has most recently seen, these descriptors are now2507 * associated with the endpoint numbers. This will foul up our2508 * attempts to submit bulk/interrupt URBs to the endpoints in2509 * interface 0, so we have to make sure that the USB core looks2510 * again at interface 0 by calling usb_set_interface() on it.2511 */2512 if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */2513 usb_set_interface(umidi->dev, 0, 0);2514 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);2515 break;2516 case QUIRK_MIDI_EMAGIC:2517 umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;2518 memcpy(&endpoints[0], quirk->data,2519 sizeof(struct snd_usb_midi_endpoint_info));2520 err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);2521 break;2522 case QUIRK_MIDI_CME:2523 umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;2524 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);2525 break;2526 case QUIRK_MIDI_AKAI:2527 umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;2528 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);2529 /* endpoint 1 is input-only */2530 endpoints[1].out_cables = 0;2531 break;2532 case QUIRK_MIDI_FTDI:2533 umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;2534 2535 /* set baud rate to 31250 (48 MHz / 16 / 96) */2536 err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),2537 3, 0x40, 0x60, 0, NULL, 0, 1000);2538 if (err < 0)2539 break;2540 2541 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);2542 break;2543 case QUIRK_MIDI_CH345:2544 umidi->usb_protocol_ops = &snd_usbmidi_ch345_broken_sysex_ops;2545 err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);2546 break;2547 default:2548 dev_err(&umidi->dev->dev, "invalid quirk type %d\n",2549 quirk->type);2550 err = -ENXIO;2551 break;2552 }2553 if (err < 0)2554 goto free_midi;2555 2556 /* create rawmidi device */2557 out_ports = 0;2558 in_ports = 0;2559 for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {2560 out_ports += hweight16(endpoints[i].out_cables);2561 in_ports += hweight16(endpoints[i].in_cables);2562 }2563 err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);2564 if (err < 0)2565 goto free_midi;2566 2567 /* create endpoint/port structures */2568 if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)2569 err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);2570 else2571 err = snd_usbmidi_create_endpoints(umidi, endpoints);2572 if (err < 0)2573 goto exit;2574 2575 usb_autopm_get_interface_no_resume(umidi->iface);2576 2577 list_add_tail(&umidi->list, midi_list);2578 if (num_rawmidis)2579 *num_rawmidis = umidi->next_midi_device;2580 return 0;2581 2582free_midi:2583 kfree(umidi);2584exit:2585 return err;2586}2587EXPORT_SYMBOL(__snd_usbmidi_create);2588